Safety door



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oct., 20,1925. mail@ C. H. LUCKING SAFETY DOOR Y Filed Aug. 24, lSQ 16 SheeS-She'e l5 1 una o I NVEN TOR BY fw 4 Mfg Oc. 20,1925. LSSSQME C. H. LUCKING SAFETY DOOR Filed Aug. 24, 1923 16 Sheets-Sheet 1.@

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Patented st. 2G, 1925A e' j.inwrse- STA.

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Application exea August-24, 192s. serial no. crasse.

y To' all inkom t may concern.'A

.Be it known that I, CHARLES H. LUCK- Iive, a citizen of the United States,` and residing at Detroit, in the county of Wa ne and State ,of Michigan, have invente a new and Improved 'Safety Door, of whichthe. following is a specification.-

'This invention' relates to means forllockingrcvoluble doors of buildings, especially the doors of banks and other institutions where large sums of, money and other valu- A'ables' are kept, and its object is to` provide Afan automatic locking device of this char-A acter which can be caused to operate from :lplurality of stations and can be released by emergency mechanism Within theprotected premises and can also be controlled from a station at,a distance from the door, preferablyat a police station.

Another object of this 4invention is to provide a lockingl mechanism of this char-l acter which is rendered-operative by closing an electric circuit but whose action may be automatically reversed within a` redetermined number of seconds by the c using a releasing vswitch which is, rendered inoperative after this predetermined'delay.

AnotherI object of provide means whereby, f slio'uld .the temperature of the air surrounkdingeanyfone of a series of fuses rise higherthan afpredetermined point2 the locking mechanisml for 'the door is lmmediately rendered inoperative and the doorpermitted to revolve freely so that in caseV ofiire, all the occupants of the room or building served by the door may esca e. d t. f

Another object of tliis invention is to r0- vide means whereby the revolvin I oor keeps wound up the clockwork which determines the time during which the releasing switch may render the locking mechanism inoperative after the normal locking circuit has been closed.

In e accon'lpanying drawings,1Fig. 1 is a plan of the locking mechanism, the release controlling clockwork and the latchl wheel." Figs. 2, 3 and 4 are sections on the lines 2 --2, 3 -8 and 114-4 of Fig. lrespectivcly,`-'sliowing the clockwork for Vdetermining the time during which the;l releasing switch may be eiiectuallyK operated and the details thereof. Fig; 5 is a front elevation of this clockwork when in normal pof theneof.

`view of these parts in operative Fig. 16 is a plan of 'ing mechanism in two .control switch in two positions.

l `.improved locking device.v this invention is te sition. Fig. 6 is a similar view after it .lOis a section on` the'line 10-10 of Fig. 9.. Figa 1l i's'another detail of this clockwork.

Fig. 12 is arear elevation showing the rewinding mechanism.A Fig. 13 is a plan Fig. 14 is a front elevation of the 'locking latch and its supporting, op-` erating 'and 4,controllin' devices when in inoperative position. Fig. 14 is a detail of the control switches. Fig. 15 is a similar osition. a solenoid an of the locking mechanism therefor on the line 16e-16 of Fig. 14. Figs. 17 and 18 are front elevations of this solenoid and its lockdiierent positions .of Fig. 16. Fig. 19-19 of Fig. 16.

taken on the line 18-18 19 is a section on the line Figs. 20 and 21 -arefront elevations of a` Fi 22 uipped wit my ig. 23 is a plan ofthe door casing and latch wheel. Fig. 24.is a section on the line 24-24 of Fig. 23`of the upper portion of the door and latch wheel while Fig. 25 is a similar section of the lower end of the door.. Fig. 26 is a section on the line 26426 of Fig. 24. Fig. 27 is a circuit diagram for this door locking mechanism. Fig. 28' is a'plan of a. llatch operating mechanism actuated by the door. Fig. 29 is a frontL` and Fig. 3,0 a side elevation of this latch'operating mechanism. Fig. 31 is an elevation of the controlling lever therefor. Figs. 32 and 33 are details of the escapement therefor. Fi ifis a detail of the friction wheel whic engages the latch wheeli 'Similar reference characters refer; to like parts throughout the several views.

Any strong revoluble door and its casing may be used in connection with my locking apparatus.. In Fig. 22 I have shown a cysteel. Theinetal panels 3 of the door (Figs,

is an elevation of-a door Ae 23 to 26) are preferably four in', number -with reinforced edges 4 which connect to a lower'pintle or shaft 5 received by the bearingv6 having bearing blocks 7, and to an upper pintle or shaft 8 which connects to the latch wheel 9. A circular 'Hange 10 `on the shaft 8 may ride on the balls 12 which run in a groove formed in the plate 13 carried by the top plate 14 of the door casing. If desired, the panels of the door may be connected by angle bars 16, as shown in Fig. 26.

The latch wheel is shown to have arms 17 and its rimv 18 has teeth 19,` and small pins 20 which serve to rewind the clockwork. The control and locking mechanism for the door are preferably mounted above the top plate 14 of the door casing .and may be. enclosed in any desired manner, a cover plate 21 beingshown in Fig. 22.

While I have shown and described a top plate 14 and all the control mechanism mounted thereon, I do not wish to be limited to such location as this control mechanism may be mounted adjacent a rotatable' `shaft connected to the door at any desired point. even belowk the floor on which -thedoor is mounted.

Mounted on the top plate 14 of the door casing is a pedestal 24, shown in Figs. 14

and 15, which carries, a pin 25 on which a short link 26 is mounted, which link carries the pin 27 on which the latch 28. is mounted. This latch is provided withtwo arms 29 and 30, adapted to tit between the teeth 19 of the latch' wheel to stop the operation thereof, which occurs when the latch is horizontal, as shown in Figs. 1 and 15. But normally, this latch is inclined, as shown in Fig. 1'4, with the arm 29 of the latch above and the arm 30 of the latch below the teeth 19 so as not to interfere with the turning of the door. To insure the latch being normally in disengaging position, the end having the arm 30 lis preferably made heavier than the other end.

As the door is liable to be turning at considerable speed when the latch is swung to engaging ',position, I prefer to provide. a cushioning deviceto ease the blow on the latch. This consists of a rod 34 slidable in the ,lug 33 on the pedestal 24 and an eye 32 at the upper end of the rod to receive the pin 27 on which the latch is mounted. The spring 35 on this rod permits the latch to swing back under the force of the blow of the latch wheel and the recoil of this spring is in turn softened by the spring 36. The clockwork is preferably at one side of this pedestal and latch and the electrical apparatus on the other 'and both are opera- `tively connected to the latch.

The clockwork. The door and latch wheel usually rotate counter-clockwise when seen from the top, asis common with doors of this character, to wind the clockwork, but the door'` may rotate in the opposite direction without doing any damage. The vclockwork may be wound in any desiredV manner, but I refe-r a'weight to a spring as there is less iability o weight driven mechanism getting out of order. The pins 20 on the latch wheel engage the. arms 40 of a star wheel 41 until the weight 42 is lifted to its highest p osition, whereupon the star wheel 1s moved endwise of its shaft 39 to carry these arms 40 out of the path of the pins 20.

The'clockwork drives a shaft 43 on which agovernor fan 44 is secured and a shaft 45 (Fig. 2) carries a blade 46 whose pointed end extends into a slotted plate 47 on the latch (Fig. '14). So long as the latch is inoperative and in its inclined position, blade 46 slopes ldown as shown in dotted lines in Fig. 2, and the rod 48 attached `thereto extends into the path of the an 44,

beingguided by the pin 49. But as soon as the latch swings to operative position, the blade 46 and rod 48 aremoved to the position shown in solid lin'es and the fan 'and the remainder of the clockwork are perritted to run under the force of the weight The stud shaft 39 for the star wheel is rigid in the side plate 50 of the clockwork frame and its outer end` may be supported by the bracket 5152 shown in Fig.- 12. Attac-hed to the star wheel is a pinion 53, and between them is4 a pair of collars 54 which guide the iingers 55 of a small plate 56 attached to the shaft 57 carried by brackets 58 attached to the plate 50. This l.ratchet wheel 63 which is engaged by the spring-held pawls 64 so that when the door turns in the proper dire'tion. the-shaft 6l is turned to wind up the cable 65 on the drum 66. but when the door is turned in the opposite direction, the ratchet wheel remains at rest.`

The drum 66 is rigid with the shaft 61, but is hollow to receive the shaft 67 to which the main driving gear 68 is attached. The ratchet wheel 69 is attached to the vdrum 66 and transmits power to 'the main gear68 by means of the spring-held pawls `'70 shown in Fig. 3. The cable 65 is attached tothe free end of a 'frame 72 whose op 0- site end is mounted lon a shaft 73 and which carries the'weight 42. The cable passes over the idler wheel 71. The action of these parts is to wind the cable and thus keep the stress of the. weight constantly on the drum. There is no necessity for-the main being wound. The

viguales .The mechanism to move the star wheel 41 out ofthe path of the pins 20 on the latch wheel comes into operation when the weight 42 has been raised to its upper limit, and is shown in Fig. 12. The parts are in the positions shown in Fig. 11 while the cable is plate56 is attachedto the shaft 57 to which an arm 74 is rigidly attached and this armcarries a Weight 75 which is sufficiently heavy to move the pini lion 53 inward. This arm 74 also carries a pin on which the two stop fingers' 76 and'v 7 7 are pivoted, which dogs liold'the arm 74 outward the desired distances. A pin 78 on the `pla'te 50 carries a lever 79 to which the weight. 80 is'attached. An arm 82 'on this lever is provided with a` finger 83 adapted. to

engage the finger 76. The Iframe 72 has a nose 84 whose path crosses the path ofthe outer end of the lever 79. A 'stop 85 is mounted on a pin 86 on the plate`50 yand'a counterweighted dog 87 is mounted on a similar pin 88. The'operation of this mechanism is as follows.

The winding position is shown in Fig.` 11. When the frame 72 has reached'the'upp'er limit of its movement, the nose 84 lifts the lever 79 whose arm 82 lifts the longer finger 76 and permits the weight 7.5 to pulldown the arm 74 until stopped by the finger 77 and thereby ,pulls back the pinion 53;- Should these parts be stuck, then the short arm 89 near the pivot of this lever 79engages the arm 90 extending back from the y.

plate 56,and forces the plate toswing inward. l

When the arm 82 moves up it turns the i stop 85. until the tooth 92 thereon slips back star of the hook 93 on the dog 87, as shown in Fig. 12. The lever 79 remains elevated, being held up by the frame 7 2-until the clockwork begins to run and the weight to descend. When this occurs thel arm 82 passes the tooth 94 on the stop 85l and 'rests n ythe tooth 95. Further lowering of the weight 42 causes the frame 72 to strikethe tail 96 of the dog 87 which releases the stop 85 and permits the lever 79 to fall to the position shown in Fig.- 11. In doing this, the arm 89 on .this lever strikes the arm "90 on the plate 56 and causes that plate' to push the wheel into the path of the pins 2O on the ljatch wheel. At the Sametime the finger 76 drops to the position shownin Fig.

lllaiid holds the star wheel in itso'uter posi- .and raise .the weight 42.

tion. The star wheel then drives the mechaiiism above described to wind upthe cable As 'stated before, the weight 42 rotates the main gear 68. Thisgear meshes with the pinion 9801i the same shaft with the gear and this gear meshes with the pinion 100 on the-same shaft with the gear 101, which in turn meshes with the pinion 102 on the shaft 43 of the fan 44 which is therefore rotated by the weight 42.

Referring now to Figs. 2and 8, the shaft 45 is shown extendin through spacing sleeves 104. A bail 105 Tias its central portion extending through an 'opening'l06 iii the plate 46 and its ends ivoted on the shaft 45. The rodl 48 lactual connects to this bail. A lip 107 extends from the bail near the lplate 108 of the clockwork frame and connects to a link 109, which in turn connect-` to a lever 11,0 mounted on a pin 111 carried by the plate 108. This link -is preferably in two ,parts connected by screws 113.v Mounted on the shaft 67 of' themain gear68 is a pinion 114 and a plate"115 which embodies an .arm 116 and a counterweight latter with the rack bar 122 when in proper position. The rack bar is guided by rollers 123 mounted on pins 124. The lowermost `'of these pins isbraced by a link 125 connecting it to the pin 111. The arm 116 carriesfa pin 126to which a link 127 is con'- nected and this link has a slot- 128 to receive the 'pin' 129 on the lever 110.

lVihen the latch 28 is swung from the posi- .tion shownV in Fig. 5 to that of'Fig. 6, the

Vbail 105 lifts the link 109 and swings the lever 110 and plate 116 to carry the gear y120 into mesh with the .rack bar 122. This `occurs simultaneously 1with the releasing of the fan 44 and the starting of the clockwork.

The rack bar 122 therefore begins to rise when the latch is moved to operative posi tion, which occurs whenever a service switch is closed. I A

Any number of service switchesmay be provided and beca'use of the possibility that onev may be accidentally closed, it is desirable that means be provided for taking care of such mistakes. A control switch is therefore provided, kas will be explained later on,

to cause the latch 28 to move to inoperative position if this control switch is closed within a predetermined time after the service switch is closed. The length of time during vwhich the control switch may be effectively Operatedvis controlled by a pin 131l on the rack'ibar 122. Y t In Iaddition to this releasing circuit which embodies the circuit wires 133 and 134, Fig.

V5 shows two other circuits 135 and 136 `which are termed the signal circuits and extend to4 a ,distant point, preferably to a police signal bureau or station. and a third circuit 137 which is part of the unlocking circuit,K the other part being the wire 135 of` the signal circuit, as will be explained I later on.. y,An insulating plate is attached to the plate 108 andl carries the switches.

When the parts are as shown in Fig. 5, thatis, until the rack bar 122 has risen beyond a point where the pin 131 swings lthe lever 138 to release the switch bar 139, the contact 140 thereon engages the stationary contact 141 and completes the circuit. between the' wires 133 and 134. This switch bar 139 has a slot 143 through which the screw 144 extends. Because of the slot 143 in the switch bar, it pivots on the contact 140 and its whole weight presses the contact 140 against the contact 141.

When the rack bar 122 has risento vthe point shown in Fig.4 6, the pin 131has slid along the curved upper end or" the lever 138 suliiciently to swing the arm 145 out of engagement with the end of the lever 146 which is pivoted on the pin 147. This per; mits the switch bar 139 to swing to the position shown in Fig. 6 and breaks the circuit to the control switch and closes the signal circuit 135.-136, giving notice at the desired place that the door is locked. This circuit is closed by bringing into engagement the contacts 148 and 149 on the switch bars 139 and 150.

The signal circuit remains closed until the pin 152 on the rack bar engages the counterweighted lever 153, as shown in Fig. 7. This lever is pivoted at 154 and connects to the switch bar 150 by means of a link 155. vVhen this lever is elevated and the switch bar '150 swung on the pin 156, the contacts 148 and 149 separate and the contacts 157 and 158 engage, closing that part of the unlocking circuit 13 5-137 which may then be made use of by proper parties at the police station. The contact 158 is shown attached to a switch bar 159 which is pivoted so as to yield it necessary. The unlocking circuit cannot be closed, however, until the rack bar 122 has reached the upper limit of its movement and may be so timed as to be any desired number of minutes after the signal circuit has been closed, this time being controlled by the `position of the pin 152. f

When the lever 153 has been it' engages the pin 160` carried by the lever 161 loosely mounted on the shaft 45. This lever connects to a small bellcrank 162 by .a link 163. This'bell-cran'k is mounted on a shaft 164 and carries a pivoted shoe 165 adapted to swing into the path `of the fan .f

44 and 'stop the clockwork wh'eneve'r the rack bar 122 has reached the upper limit of its movement. This shoe engages the blades of the fan gradually and thus retards before it stops. y

When the latch returns to normal posi- ;tipn,; the gear 120 is swung out` of engage- '.fvhent with the rack bar and that is started Qdown'5-jby thecounterweighted lever 153 and pushed up,-

Meeres its own weight. Its lower end strikes the lever 146 and permits the lower end ofthe lever 138to swing into engagement therewith and at the same time swings the switch bar 139 to its normal position to close the control circuit. The dropping of thelever 153 .carries the switch bar 150 to normal position and opens the unlocking circuit. It also permits the lever 161 to swing .down and carry the shoe 165 out of the path of the fan 44.

TheV latch operati/ng mechanism.

While the electro-mechanical latch operating mechanism may be of many different designs, a reliable and simple embodiment of this invention is illustrated in Figs. 14 to 21 inclusive, Fig. 14 showingthe latch and latch wheel disengaged and Fig. 15 these two elements in engagement to pre'- vent the door from rotating. It must be remembered that the latch is counterweighted to disengaging position and that it must be forced to engaging position.

.The latch operating mechanism shown embodies the switch operating solenoid 170, the double latch-operating solenoid 1.71- 17 2- and the relay 173. This relay is brought into action so it may be of use in case of tire and will be explained later on. Referring 'first to the `double solenoid, a core 174 therein has .a stirrup 175 at its upper end which receives the arm 176 pivoted'at 177 on the bracket 178 extending from the upper end of the link 26v which supports the latch. A. loop 179 on this latch'causes the latch to move up with this arm 176 when the upper part 172 of the double solenoid is energized, which occurs when a proper unlocking current is received. This 1s only for safety as the latch is counterweighted to assume unlocking position.

The core is held lup by a small dog 181` (Fig. 17) which is slidable in guides 182 by a lever 183 having a finger 184 which enters a notch in this dog and moves the inner end thereof into or out of the notch 185 in this core. This lever is pivoted'on the pin 186 carried by a bracket 187 mounted on the shell of this solenoid. This dog is prevented from engaging the core 174, after it has been pulled out, by a yoke 188 pivoted at 189, as shown in Fig. 18, until the core is again at the upper end of its movement, when the lugs 190 on this core engage this yoke and lift it out of the path of the dog v181. as shown in Fig. 17.

the latch wheel.. A small block of rubber 194 may be inserted between the Spring and the yoke. As soon as an opening.v between 

